﻿/*
	By Osvaldas Valutis, www.osvaldas.info
	Available for use under the MIT License
*/



; (function ($, window, document, undefined) {
    var isTouch = 'ontouchstart' in window,
		eStart = isTouch ? 'touchstart' : 'mousedown',
		eMove = isTouch ? 'touchmove' : 'mousemove',
		eEnd = isTouch ? 'touchend' : 'mouseup',
		eCancel = isTouch ? 'touchcancel' : 'mouseup',
		secondsToTime = function (secs) {
		    var hoursDiv = secs / 3600, hours = Math.floor(hoursDiv), minutesDiv = secs % 3600 / 60, minutes = Math.floor(minutesDiv), seconds = Math.ceil(secs % 3600 % 60);
		    if (seconds > 59) { seconds = 0; minutes = Math.ceil(minutesDiv); }
		    if (minutes > 59) { minutes = 0; hours = Math.ceil(hoursDiv); }
		    return (hours == 0 ? '' : hours > 0 && hours.toString().length < 2 ? '0' + hours + ':' : hours + ':') + (minutes.toString().length < 2 ? '0' + minutes : minutes) + ':' + (seconds.toString().length < 2 ? '0' + seconds : seconds);
		},
		canPlayType = function (file) {
		    var audioElement = document.createElement('audio');
		    return !!(audioElement.canPlayType && audioElement.canPlayType('audio/' + file.split('.').pop().toLowerCase() + ';').replace(/no/, ''));
		};

    $.fn.audioPlayer = function (params) {
        var params = $.extend({ classPrefix: 'audioplayer', strPlay: 'Play', strPause: 'Pause', strVolume: 'Volume' }, params),
			cssClass = {},
			cssClassSub =
			{
			    playPause: 'playpause',
			    playing: 'playing',
			    stopped: 'stopped',
			    time: 'time',
			    timeCurrent: 'time-current',
			    timeDuration: 'time-duration',
			    bar: 'bar',
			    barLoaded: 'bar-loaded',
			    barPlayed: 'bar-played',
			    volume: 'volume',
			    volumeButton: 'volume-button',
			    volumeAdjust: 'volume-adjust',
			    noVolume: 'novolume',
			    muted: 'muted',
			    mini: 'mini'
			};

        for (var subName in cssClassSub)
            cssClass[subName] = params.classPrefix + '-' + cssClassSub[subName];

        this.each(function () {
            if ($(this).prop('tagName').toLowerCase() != 'audio')
                return false;

            var $this = $(this),
				audioFile = $this.attr('src'),
				isAutoPlay = $this.get(0).getAttribute('autoplay'), isAutoPlay = isAutoPlay === '' || isAutoPlay === 'autoplay' ? true : false,
				isLoop = $this.get(0).getAttribute('loop'), isLoop = isLoop === '' || isLoop === 'loop' ? true : false,
				isSupport = false;

            if (typeof audioFile === 'undefined') {
                $this.find('source').each(function () {
                    audioFile = $(this).attr('src');
                    if (typeof audioFile !== 'undefined' && canPlayType(audioFile)) {
                        isSupport = true;
                        return false;
                    }
                });
            }
            else if (canPlayType(audioFile)) isSupport = true;

            var thePlayer = $('<div class="' + params.classPrefix + '">' + (isSupport ? $('<div>').append($this.eq(0).clone()).html() : '<embed src="' + audioFile + '" width="0" height="0" volume="100" autostart="' + isAutoPlay.toString() + '" loop="' + isLoop.toString() + '" />') + '<div class="' + cssClass.playPause + '" title="' + params.strPlay + '"><a href="#">' + params.strPlay + '</a></div></div>'),
				theAudio = isSupport ? thePlayer.find('audio') : thePlayer.find('embed'), theAudio = theAudio.get(0);

            if (isSupport) {
                thePlayer.find('audio').css({ 'width': 0, 'height': 0, 'visibility': 'hidden' });
                thePlayer.append('<div class="' + cssClass.time + ' ' + cssClass.timeCurrent + '"></div><div class="' + cssClass.bar + '"><div class="' + cssClass.barLoaded + '"></div><div class="' + cssClass.barPlayed + '"></div></div><div class="' + cssClass.time + ' ' + cssClass.timeDuration + '"></div><div class="' + cssClass.volume + '"><div class="' + cssClass.volumeButton + '" title="' + params.strVolume + '"><a href="#">' + params.strVolume + '</a></div><div class="' + cssClass.volumeAdjust + '"><div><div></div></div></div></div>');

                var theBar = thePlayer.find('.' + cssClass.bar),
					barPlayed = thePlayer.find('.' + cssClass.barPlayed),
					barLoaded = thePlayer.find('.' + cssClass.barLoaded),
					timeCurrent = thePlayer.find('.' + cssClass.timeCurrent),
					timeDuration = thePlayer.find('.' + cssClass.timeDuration),
					volumeButton = thePlayer.find('.' + cssClass.volumeButton),
					volumeAdjuster = thePlayer.find('.' + cssClass.volumeAdjust + ' > div'),
					volumeDefault = 0,
					adjustCurrentTime = function (e) {
					    theRealEvent = isTouch ? e.originalEvent.touches[0] : e;
					    theAudio.currentTime = Math.round((theAudio.duration * (theRealEvent.pageX - theBar.offset().left)) / theBar.width());
					},
					adjustVolume = function (e) {
					    theRealEvent = isTouch ? e.originalEvent.touches[0] : e;
					    theAudio.volume = Math.abs((theRealEvent.pageY - (volumeAdjuster.offset().top + volumeAdjuster.height())) / volumeAdjuster.height());
					},
					updateLoadBar = function () {
					    var interval = setInterval(function () {
					        if (theAudio.buffered.length < 1) return true;
					        barLoaded.width((theAudio.buffered.end(0) / theAudio.duration) * 100 + '%');
					        if (Math.floor(theAudio.buffered.end(0)) >= Math.floor(theAudio.duration)) clearInterval(interval);
					    }, 100);
					};

                var volumeTestDefault = theAudio.volume, volumeTestValue = theAudio.volume = 0.111;
                if (Math.round(theAudio.volume * 1000) / 1000 == volumeTestValue) theAudio.volume = volumeTestDefault;
                else thePlayer.addClass(cssClass.noVolume);

                timeDuration.html('&hellip;');
                timeCurrent.html(secondsToTime(0));

                theAudio.addEventListener('loadeddata', function () {
                    updateLoadBar();
                    timeDuration.html($.isNumeric(theAudio.duration) ? secondsToTime(theAudio.duration) : '&hellip;');
                    volumeAdjuster.find('div').height(theAudio.volume * 100 + '%');
                    volumeDefault = theAudio.volume;
                });

                theAudio.addEventListener('timeupdate', function () {
                    timeCurrent.html(secondsToTime(theAudio.currentTime));
                    barPlayed.width((theAudio.currentTime / theAudio.duration) * 100 + '%');
                });

                theAudio.addEventListener('volumechange', function () {
                    volumeAdjuster.find('div').height(theAudio.volume * 100 + '%');
                    if (theAudio.volume > 0 && thePlayer.hasClass(cssClass.muted)) thePlayer.removeClass(cssClass.muted);
                    if (theAudio.volume <= 0 && !thePlayer.hasClass(cssClass.muted)) thePlayer.addClass(cssClass.muted);
                });

                theAudio.addEventListener('ended', function () {
                    thePlayer.removeClass(cssClass.playing).addClass(cssClass.stopped);
                });

                theBar.on(eStart, function (e) {
                    adjustCurrentTime(e);
                    theBar.on(eMove, function (e) { adjustCurrentTime(e); });
                })
				.on(eCancel, function () {
				    theBar.unbind(eMove);
				});

                volumeButton.on('click', function () {
                    if (thePlayer.hasClass(cssClass.muted)) {
                        thePlayer.removeClass(cssClass.muted);
                        theAudio.volume = volumeDefault;
                    }
                    else {
                        thePlayer.addClass(cssClass.muted);
                        volumeDefault = theAudio.volume;
                        theAudio.volume = 0;
                    }
                    return false;
                });

                volumeAdjuster.on(eStart, function (e) {
                    adjustVolume(e);
                    volumeAdjuster.on(eMove, function (e) { adjustVolume(e); });
                })
				.on(eCancel, function () {
				    volumeAdjuster.unbind(eMove);
				});
            }
            else thePlayer.addClass(cssClass.mini);

            thePlayer.addClass(isAutoPlay ? cssClass.playing : cssClass.stopped);

            thePlayer.find('.' + cssClass.playPause).on('click', function () {
                if (thePlayer.hasClass(cssClass.playing)) {
                    $(this).attr('title', params.strPlay).find('a').html(params.strPlay);
                    thePlayer.removeClass(cssClass.playing).addClass(cssClass.stopped);
                    isSupport ? theAudio.pause() : theAudio.Stop();
                }
                else {
                    $(this).attr('title', params.strPause).find('a').html(params.strPause);
                    thePlayer.addClass(cssClass.playing).removeClass(cssClass.stopped);
                    isSupport ? theAudio.play() : theAudio.Play();
                }
                return false;
            });

            $this.replaceWith(thePlayer);
        });
        return this;
    };
})(jQuery, window, document);